align card font sizes across the conversation stream (T-344)

ClideCollapserCard and ConversationCard sat adjacent but used different
tokens for the same roles, so labels/summaries rendered 1-2px apart.
Standardise both on label = clideFontCaption (14), collapsed summary =
clideFontMeta (13): bump ConversationCard's label up from clideFontSmall,
bring the collapser's summary down from clideFontCaption. Goldens
regenerated for the affected card images.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

lib/widgets/src/clide_collapser_card.dart

@@ -117,7 +117,9 @@ class _ClideCollapserCardState extends State<ClideCollapserCard> {
           Expanded(
             child: ClideText(
               widget.collapsedSummary!,
-              fontSize: clideFontCaption,
+              // Summary one step below the label, matching ConversationCard so
+              // collapser + tool cards read consistently in the stream (T-344).
+              fontSize: clideFontMeta,
               fontFamily: clideMonoFamily,
               color: tokens.globalTextMuted,
               maxLines: 1,